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Introduction  Traditional maps are designed to display geospatial data on paper in two dimensions.  Geovisualization allows the cartographer to display geospatial data in three dimensions. The user can interactively navigate the data from multiple perspectives, providing improved visualization.  Project Objectives: Create a virtual environment depicting the SIUE Dental School Campus in Alton. Show the terrain in 3D, depict features above and below the ground using 3D symbols, and create a movie allowing geovisualization of the scene from multiple perspectives.

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Methodology  Created a 3D Model of the Science Building using SketchUp.  Georeferenced imagery from Google provided actual location for accurate dimensions.  The building was created by extruding polygons and applying various textures to the surfaces.  Upon completion, the 3D building was imported as symbology for a point feature representing the actual building location.  The Science Building was built in 1836 on the grounds of a seminary as part of Shurtleff College. The college reached a peak enrollment of 700 in 1950, before being purchased by SIUE in 1957 for the dental school.

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Methodology  ArcCatalog: Created file geodatabase to contain all data for the project.  Geodatabase was created using domains, feature datasets, and feature classes with subtypes. The DEM and orthophoto were loaded as raster datasets.  Spatial reference information was imported from the raster datasets when creating feature datasets.  Feature classes created using domains and subtypes.  Geometric Networks were created for the electric and water utilities after digitizing was completed.

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Methodology  Domains and subtypes were used for all applicable feature classes to provide default values, reduce errors, and speed up digitizing.

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Methodology  Digital orthophoto was used as a reference to digitize all features.  Features were added as layers to ArcScene, using Base Heights to drape all features over the DEM.  Offset height values were used to raise the power lines to the top of the power poles, and to lower the water lines below the ground.  Pavement was offset slightly above the grass for better visibility.  3D Symbology was applied to all features in ArcScene and appropriately sized.

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Conclusion  Project succeeded in creating a virtual environment depicting the SIUE Dental School campus.  Use of 3D features enhances the scene by depicting terrain and geospatial data in a more realistic fashion than traditional 2D paper maps.  Geovisualization provided by the fly through movie allows the user to navigate the scene from a birds- eye view, providing multiple perspectives of complex data sets.  Questions